"I'm dying to go to Alaska one day; I've got to go," said Cowell on a conference call today. "I would have done it this year - I don't know why we didn't do it.

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"If we're still around next year I'm going to make a big push to go there because I love going to places we've never been before."

The recently-announced audition booths, powered by MyStudios, will give aspiring singers who cannot attend one of the open auditions the chance to record and submit an audition video at a local recording studio in several locations across the US.

"It's like doing an audition in front of the producers or the guys at the record label at an open audition," explained Cowell. "They are officially branded X Factor audition tapes and they will be sent to the producers and everyone effectively will be auditioned by a producer.

"The whole idea of the show was we have invited the whole of America to audition and this is just another attempt to get the reach out really... I'm going to try and put this in as many cities as possible prior to us filming."

The audition booths will open in Honolulu and Phoenix tomorrow, with further booths opening in Nashville (April 9), Anchorage (April 12), Kansas City (April 15) and Denver (April 16). The booths will remain open until April 30.

Open auditions, which kicked off in Los Angeles last week and traveled to Miami today, continue at the Prudential Center, Newark (April 14), Key Arena, Seattle (April 20), Sears Center Arena, Chicago (April 27) and Dallas Convention Center, Dallas (May 26). More information on the auditions is available here.

Cowell added that he is happy with the turnout so far, saying: "The numbers are much higher than we anticipated. We started off in LA and it was just under 20,000 that turned up and everyone was seen, and the latest count from Miami is around 8 to 10,000 expected."